hi Hotas,
when click the icon "i" follows each partnumber, you will see the description for the partnumber.
for example,
the description for CWX-OSK-D10K-DL is 'OSEK DISTRIBUTION LICENSE FOR <10K UNITS'
for CWX-OSK-D1K-DL, it means "OSEK DISTRIBUTION LICENSE FOR <1K UNITS"
the main difference is in the distribution number.